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Finding the Fourth Proportional to 94.34, 130.20 and 61.16

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Solution

The fourth proportional to 94.34, 130.20 and 61.16 is: 84.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.34 : 130.20 = 61.16 : x
  2. Step 2: Convert to fraction form
    94.34/130.20 = 61.16/x
  3. Step 3: Cross multiply
    94.34x = 130.20 × 61.16
  4. Step 4: Simplify right side
    94.34x = 7,962.15
  5. Step 5: Solve for x
    x = 7,962.15/94.34
  6. Step 6: Final answer
    x = 84.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.